AB 1664 (Levine) removes a loophole that allows for "bullet buttons" that allow for magazines to be easily switched out. The shooters in the recent murders in San Bernardino utilized this customization to quickly change magazines as they attacked civilians and law enforcement.

AB 1673 (Gipson) makes it harder for people to obtain gun parts and components that can then be assembled into nearly untraceable "ghost guns."

AB 1674 (Santiago) limits the purchase of long guns to one per month—just like handguns. Attempts by individuals to "stock up" on multiple guns could be a red flag that violence is imminent.